Arsenal boss Arsene Wenger says their victory over Roma in the Champions League was the catalyst for their season turnaround.

"There is always a key moment and Rome was that catalyst," he told L'Equipe.

"Before that, we weren't losing but we were not convincing. Since Rome, we are scoring again and we have the best run going, and that is a barometer of confidence.

"Now we are unbeaten in 17 matches and that leaves me with a lot of regrets."